Heel



FIG. 1 is a right front perspective view of the heel according to the design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof, the left side being a mirror image thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a right front perspective view of a shoe with the heel.

The broken lines form no part of the claimed design 

CLAIM The ornamental design for a heel, as shown and described. 